target: Remove soft_reset_halt_imp

Change-Id: I12c907584ef73de570eba2dcfeb8477cabc6098f
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/1217
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
target: Remove write_memory_imp

Change-Id: I5d933bc19443bba8a0193c90471fdd0614324a92
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/1218
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
target: Remove read_memory_imp

Change-Id: Idc6ef3b075ccbb5945df8fea746011cb17175d8f
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/1219
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>